bsd/dev/random/YarrowCoreLib/src/yarrowUtils.c

   1 /*
   2  * Copyright (c) 1999, 2000-2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*
  25         File:           yarrowUtils.c
  26
  27         Contains:       Misc. utility functions.
  28
  29         Written by:     Doug Mitchell
  30
  31         Copyright: (c) 2000 by Apple Computer, Inc., all rights reserved.
  32
  33         Change History (most recent first):
  34
  35                 02/29/00        dpm             Created.
  36
  37 */
  38
  39 #include "dev/random/YarrowCoreLib/include/yarrowUtils.h"
  40 #include <string.h>
  41
  42 void
  43 trashMemory(void* mem, int len)
  44 /* This function should only be used on data in RAM */
  45 {
  46         if(len == 0) {
  47                 /* some memsets really don't like this */
  48                 return;
  49         }
  50
  51         /* Cycle a bit just in case it is one of those weird memory units */
  52         /* No, I don't know which units those would be */
  53         memset(mem,0x00,len);
  54         memset(mem,0xFF,len);
  55         memset(mem,0x00,len);
  56 }
  57
  58